Remove SDL Dependency

[HackingPheasant]

Removal SDL Dependency
Why? This project is intended for me to learn and experiment with C++, and learning to integrate with OS Specific functions/syscalls to create a window to render to is an interesting area to learn and attempt.
Other reasons include:

• I looked at the SDL code and it is very messy (read as hard to read/follow) and there is a lot of code duplication there
• Almost all leaks reported by Valgrind/AddressSanitizer are coming from SDL
• I, so far, only use SDL for window creation and getting window size, so I am not making use of most features available